G3H203SNDC524 Datasheet, PDF (7/12 Pages) Omron Electronics LLC – Solid State Relays Technical Information

Small-capacity Loads
Even when there is no input signal to the SSR, there is a small leak-
age current (I_L) from the SSR output (LOAD). If this leakage current
is larger than the load release current, the SSR may fail to reset.
Connect a bleeder resistance R in parallel to increase the SSR
switching current.
Load (e.g., relays) release voltage
Load (e.g., relays) release current
E
R<
IL-I
E: Load (e.g., relays) reset voltage
I: Load (e.g., relays) reset current
Bleeder resistance R
Load
Bleeder resistance standards:
100-VAC power supply, 5 to 10 kΩ, 3 W
200-VAC power supply, 5 to 10 kΩ, 15 W
Inverter Load
Do not use an inverter-controlled power supply as the load power
supply for the SSR. Inverter-controlled waveforms become rectangu-
lar, so the dV/dt ratio is extremely large and the SSR may fail to
reset. An inverter-controlled power supply may be used on the input
side provided the effective voltage is within the normal operating volt-
age range of the SSR.
Voltage increase ratio
The dV/dt ratio tends to infinity,
so the SSR will not turn OFF.
∆V/∆T = dV/dt: voltage increase ratio
Capacitive Load
The supply voltage plus the charge voltage of the capacitor is applied
to both ends of the SSR when it is OFF. Therefore, use an SSR
model with an input voltage rating twice the size of the supply volt-
age.
Limit the charge current of the capacitor to less than half the peak
inrush current value allowed for the SSR.
I Load Power Supply
Rectified Currents
If a DC load power supply is used for full-wave or half-wave rectified
AC currents, make sure that the peak load current does not exceed
the maximum usage load power supply of the SSR. Otherwise, over-
voltage will cause damage to the output element of the SSR.
Peak voltage
SSR operating
voltage maximum
value
Operating Frequency for AC Load
Power Supply
The operating frequency range for an AC load power supply is 47 to
63 Hz.
Low AC Voltage Loads
If the load power supply is used under a voltage below the minimum
operating load voltage of the SSR, the loss time of the voltage
applied to the load will become longer than that of the SSR operating
voltage range. See the following load example. (The loss time is
A < B.)
Before operating the SSR, make sure that this loss time will not
cause problems.
If the load voltage falls below the trigger voltage, the SSR will not turn
ON, so be sure to set the load voltage to 24 VAC minimum. (Except
for the G3PA-VD and G3NA-2@@B.)
100 VAC (R load) trigger voltage
24 VAC (R load) trigger voltage
Trigger voltage
Trigger voltage
trigger voltage
trigger voltage
I Operation
Leakage Current
A leakage current flows through a snubber circuit in the SSR even
when there is no power input. Therefore, always turn OFF the power
to the input or load and check that it is safe before replacing or wiring
the SSR.
Switch element
Snubber circuit
Leakage
current
834
Solid State Relays Technical Information